Revenue from admissions rose 15 percent to $571 million while concessions revenue was up 18 percent to $227.7 million.

Amy Miles, CEO of Regal, which operates the nation's largest chain of movie theaters, called the second-quarter box-office environment "healthy." Hit movies during the quarter ending June 30 included Iron Man 3, Man of Steel and Monsters University.

Despite some high-profile flops of late, said she is "optimistic" about the current quarter.